1. A) 6x = -42 - 12
6x = -54 /:6
x = -9
B) -6x = 28 - 40
-6x = -12 /:-6
x = 2
C) 3x - x = 1 - 12
2x = -11 /:2
x = -5,5
D) 4x - 7x = -24 + 3
-3x = -21 /:-3
x = 7
E) x/6 = 1 + 1/6
x/6 = 1 i 1/6 /*6
x = 7
2. Mężczyźni - x
Kobiety - 4x
x + 4x = 95
5x = 95 /:5
x = 19
19*4 = 76
W tej szkole pracuje 76 nauczycielek.
3. 2 * 5 - 2 * (-½) +1 = 10 - (-1) + 1 = 12
